Box-and-whisker plot9.12 The data show the number of hours spent studying per day by a sample of 28 students. Use the box-and-whisker plot below to answer parts (a) through (c) below.11483334282143228(a) About 75% of the students studied no more than how many hours per day?About 75% of the students studied no more thanhours per day.(Type an integer or decimal rounded to one decimal place as needed.)(b) What percent of the students studied more than 3 hours per day?Aboutof the students studied more than 3 hours per day.(c) You randomly select one student from the sample. What is the likelihood that the student studied less than 2 hours per day?The likelihood of this eventabout

Here Given Boxplot of 28 students Studying number of hours. Now From Box plots Q1=2 Hours…

Answered: (a) About 75% of the students studied…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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According to a 2009 Reader's Digest article, people throw away about 14% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 135 grocery shoppers to investigate their behavior. What is the probability that the sample proportion does not exceed 0.19? Answer = (Enter your answer as a number accurate to 4 decimal places.)
Stress at work: In a poll about work, 51% of respondents said that their jobs were sometimes or always stressful. Eleven workers are chosen at random.What is the mean number who find their jobs stressful in a sample of 11 workers? Round the answer to two decimal places.
What is the probability of a z score greater than -1.97?
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" In a recent year, 1079 respondents answered both questions. The summary statistics are given in the chart below. (The sample data consist of the times, in hours per week, that were given by the respondents.) Sample Sample Sample size Groups mean variance Less than h.s. High school Bachelor's 258 40.9 101.8 263 41.8 97.5 270 42.2 94.4 Graduate 288 43.0 98.7 Send data to calculator Send data to Excel To decide if there are any differences in the mean hours per week worked by these different groups, we can perform a one-way, independent-samples ANOVA test. Such a test uses the following statistic. Variation between the samples F= Variation within the samples For the data from…
The data on the right represent the number of traffic fatalities by seat location and gender. Determine P(female) and P(female/driver). Are the events "female" and "driver" independent? Determine P(female). P(female) = (Round to three decimal places as needed.) Driver Male Female Total 32,738 11,842 44,580 Passenger 6,346 6,395 12,741 Total 39,084 18,237 57,321
The General Social Survey is an annual survey given to a random selection of about 1500 adults in the United States. Among the many questions asked are "What is the highest level of education you've completed?" and "If you're employed full-time, how many hours do you spend working at your job during a typical week?" In a recent year, 1116 respondents answered both questions. The summary statistics are given in the chart below. (The sample data consist of the times, in hours per week, that were given by the respondents.) Sample Sample Sample Groups size mean variance Less than 281 41.6 115.8 h.s. High school 260 43.3 96.3 Bachelor's 294 42.5 100.5 Graduate 281 44.2 108.2 Send data to Excel Based on these summary statistics, we perform a one-way, independent-samples ANOVA test to determine if there is a difference in the mean hours worked in a typical week among the four populations of workers. (a) The results of this ANOVA are given in the incomplete ANOVA table below. Complete the…
In the winter, guests who visit Yosemite National Park like to stay at an overnight lodge in the park 66 % of the time. Find the probability that among 7 guests surveyed exactly 5 guests like to stay at an overnight lodge in the park.P(x = 5)
The data on the right represent the number of traffic fatalities by seat location and gender. Determine P(female) and P(female|driver). Are the events "female" Passenger 6,594 6,214 12,808 and "driver" independent? Male Female Total Driver 32,740 11,840 44,580 Total 39,334 18,054 57,388 ... Determine P(female). P(female) = (Round to three decimal places as needed.)
The table summarizes results from 979 pedestrian deaths that were caused by automobile accidents. DriverIntoxicated? Pedestrian Intoxicated? Yes No Yes 59 74 No 248 598 If two different pedestrian deaths are randomly selected, find the probability that they both involved pedestrians that were not intoxicated.Report the answer as a percent with two decimal places accuracy. (You need not enter the "%" symbol).Probability = %
According to a 2009 Reader's Digest article, people throw away approximately 17% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 114 grocery shoppers to investigate their behavior. What is the probability that the sample proportion is between 0.09 and 0.15? Answer = (Enter your answer as a number accurate to 4 decimal places.)
A geneticist conducts an experiment with peas, one sample of offspring consisted of 448 green peas and 162 yellow peas. Based on these results, estimate the probability of getting an offspring pea that is green. Report the answer as a percent with one decimal place accuracy. (You need not enter the "%" symbol) Probability
1000 us adults were asked about their online vs. in store clothes shopping. One finding was that 32% of respondents never clothes-shop online. How do I find the probability that the pecentage of respondents who never shop online is below 33.3%

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